Erasing device.



L. E. HANSEN. ERASING DEVICE. APPLICATION FILED DEC. 2a, 1916.

1&603'4? Patented Mar. 26, 1918.

INVENTUR hy *M ATTEIR'NEYEI.

' ing or drawing on paperand ills f;

LAURA E. HANSEN, OF BUFFALO, NEW YORK.

ERASING DEVICE.

Specification of Letters Patent. I

Patented Mar. 26, 1918.

Application filed December 26, 1916. Serial No. 138,991.

To all whom it may concern:

Be it known that I, LAURA E. HANSEN, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Erasing Devices, of which the following is a specification.

This invention relates more particularly to an erasing device of that class which is more particularly designed for erasing writfor removing the dust particles from the paper although the same may also be used for other purposes.

It is the object of this invention to provide an erasing device in which the abrasive member and the cleaning brush are detachably mounted on a holder so that the same may be readily and conveniently renewed when necessary, thereby permitting the holder to be used repeatedly with successive new abrasive members and brushes and thereby effect a considerable economy.

In the accompanying drawings:

Figures 1 and 2 are side elevations of the preferred form of my invention viewed from opposite sides thereof. Fig. 3 is an edge elevation thereof. Fig. 4 is afragmentary longitudinal section, on an enlarged scale, taken on line &4, Fig. 1. Fig. 5 is an end elevation, on an enlarged scale, of the inner section of the tubular arbor for detachably connecting the holder, abrasive member and washer of my improved erasing device. Fig. 6. is a cross section, on an enlarged scale, of the outer section of the tubular arbor above referred to. Fig. 7 is a cross section taken on the correspondingly numbered line in Fig. 41.

Similar characters of reference indicate corresponding parts throughout the several views.

The holder of my improved erasing device may be constructed of various kinds of material and in Various forms but that, for example, which is shown in the drawings is constructed of sheet metal so as to produce an upper fiat shank 1 which is provided with a transverse opening 2 while its lower end is bent to form a longitudinal socket 3 which opens downwardly from the lower end of the holder. 4 represents an abrasive member which is constructed in the form of a disk and composed of rubber or a mixture of rubber and emery, or the like, so that the edge of the same may be utilized for rubbing or removing written or similar matter from a sheet of paper or other surface. This abrasive member engages only on one of its flat sides with one side of the shank of the holder and is provided with a central opening 5 which registers with the opening in the holder. On that side of the abrasive member opposite to the shank of the holder the same is engaged by a washer 6 preferably of metal and having a central opening 7 which registers with the openings of the abrasive member and the holder. The holder abrasive member and washer are detachably connected with each other by an arbor or coupling device which preferably comprises inner and outer tubular sections 8, 9 which telescope or slide one over the other within the openings of the holder, abrasive member and washer and which are provided respectively with external annular flanges or shoulders 10, 11 one of which is adapted to engage with the outer side of the holder and the other with the outer side of the washer, as shown in Fig. 1. The two sections of the tubular arbor are preferably interlocked with each other in their operative position by friction, this being accomplished in a simple and inexpensive manner by providing the inner section of the tubular arbor with longitudinal slits 12 extending inwardly from that end thereof opposite to its flanged end, thereby splitting this sleeve so as to form a plurality of spring jaws 13 thereon. On the outer or peripheral sides of these jaws the same are provided with looking projections or beads 14 which in the expanded or operative position of the same engage with an internal annular locking groove 15 formed in the bore of the outer arbor section, as shown in Fig. 4, and there by retain this arbor in its normal. operative position so as to retain the holder, abrasive member and washer in an assembled condition for use. When the parts are thus organized the abrasive member may be turned for bringing all parts of its peripheral edge into the most convenient position for making an erasure, this operation beingpossible until the entire periphery of the abrasive member has been worn down to the edge of the washer and the adjacent part of the holder. When thus worn out the abrasive member can be readily removed from the holder by pulling the two sections of the arbor apart by the fingers and thereby releasing the abrasive member confined be tween the holder and the Washerf A new abrasive member may then be placed upon the arbor and secured between the holder and Washer by pushing the tWo sections of the arbor one over the other and through the openings of the holder, abrasive .member and washer until "the locking projections of the inner arbor section engage with thelocking groove of the outer arbor section, there by restoring the erasing device to its .normal operative condition.

In order to permit of brushing off the dust from thefsurfiace which :has been rubbed by the abrasive member .axbrushin'g device is mounted on the opposite end of the holder. This brushing device preferably comprises a sleeve 16, preferably of sheet metal, which is adapted to .slide into the socket 3 and lf'rictionally retained therein and a bunch of brush bristles 17 secured at their inner ends Within the :sleeveavhile their outer ends project beyond the outer end of the slceveand the holder So that they may serve as a small brush 'or :broom for cleaning purposes. When this brush becomes Worn out the sleeve may be withdrawn and discarded and replaced by another sleeve containing new bristles. The cross section of the socket, the sleeve, an'd'th'e bunch of bristles is preferably :such that these several parts are flat tened in the same plane as the abrasive member and thus enable this device to be stowed awaycompactly. L

By thus mounting the abrasive member and the brushing device 011 the holderso that the same are detachable therefrom and capable of being readily and quickly renewed when WOl'IlwOllt it is unnecessary to discardthe Whole erasing device When the bristles and abrasive :member are Wornou-t but permits these last mentioned parts to be renewed and the same holder to be used repeatedly in connection with successive new abrasive members and brush members, thereby effecting .a considerable saving as compared with the devices heretofore in use.

In attainingthis object in its simplest and most practical form it is essential to en gage the abrasive member with the holder on one srde only and to mount one end only of the arbor on the holder, as-s'howni-n Figs.

1-4 so as to r-render the assembling and dismembering of the parts easy I claim-as my invention: a V A combined brush holder and eraser support, an erasereand releasable means for 'de tachably securing said-eraser to oneside only of the eraser support. I

LAURA HANSEN.

Gepiesmf this patent may be obtained for .five cents each, by addressing the Commissioner of Patents, -Washington, D. G.

and convenient. 

